import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';
import  {BrowserRouter} from 'react-router-dom';

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
  <React.StrictMode>
      <BrowserRouter>
          <App />
      </BrowserRouter>
  </React.StrictMode>
);

// 虚拟dom
const mountElement = ReactDOM.createRoot(document.getElementById('dom'));
const cssNames =['box','alert']
const buttonElement = React.createElement('button', {className:cssNames},"点击我");
const labelElement = (<div className="label">
        <label className={cssNames} htmlFor="email">邮件</label>
        <div>{buttonElement}</div>
    </div>)

mountElement.render(
    labelElement,mountElement
);

// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();
